jsonstore-js/lib/object.js

A javascript JSON data store with manifold abilities of data processing

'use strict';

var utils = require('./utils');

var getObjectKeyByValue = function getObjectKeyByValue(obj, value) {
  var objKey, objValue, valueKey;
  if (utils.type(value) === 'object') {
    outer: for (objKey in obj) {
      if (obj.hasOwnProperty(objKey) && utils.type(objValue = obj[objKey]) === 'object') {
        for (valueKey in value) {
          if (value.hasOwnProperty(valueKey) && value[valueKey] !== objValue[valueKey]) {
            continue outer;
          }
        }
        return objKey;
      }
    }
  } else {
    for (objKey in obj) {
      if (obj.hasOwnProperty(objKey) && obj[objKey] === value) {
        return objKey;
      }
    }
  }
  return undefined;
};

var extend = function extend() {
  var target = arguments[0],
      argLen = arguments.length;
  for (var i = 1; i < argLen; i++) {
    var source = arguments[i],
        key;
    if (utils.type(source) === 'object') {
      for (key in source) {
        if (source.hasOwnProperty(key)) {
          target[key] = utils.copy(source[key]);
        }
      }
    }
  }
  return target;
};

module.exports = {
  hasOwnProperty: Object.prototype.hasOwnProperty,
  extend: extend,
  getObjectKeyByValue: getObjectKeyByValue
};